Home / 21,696.20-32,495.70-18,780.20

Finding the Fourth Proportional to 21,696.20, 32,495.70 and 18,780.20

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Solution

The fourth proportional to 21,696.20, 32,495.70 and 18,780.20 is: 28,128.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,696.20 : 32,495.70 = 18,780.20 : x
  2. Step 2: Convert to fraction form
    21,696.20/32,495.70 = 18,780.20/x
  3. Step 3: Cross multiply
    21,696.20x = 32,495.70 × 18,780.20
  4. Step 4: Simplify right side
    21,696.20x = 610,275,745.14
  5. Step 5: Solve for x
    x = 610,275,745.14/21,696.20
  6. Step 6: Final answer
    x = 28,128.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.